THIS is the big one. It's great for your really BIG projects. This servo has
a Diecast aluminum case with waterproofing down to 11 feet and RFI/EMI shileding.
It's also Futaba Servo Command Pulse compatible.

We recommend using this unit with a servo saver to avoid
coupling mechanical shocks to the gear train or overloading the motor. A servo
saver can be a calibrated torque coupling spring that yields under the 27 ft/lb
limit of the servo, or any common shaft alignment method that utilizes an elastomer
to transmit torque, or a torque limiting slip clutch, or the best method, a
breakaway clutch that has the added advantage of restoring position like found at zero-max.com.